How to out rank these affiliate sites in google search ?

well today i m searching for some affiliate sites related to health niche and while browsing i found lots of one page wordpress websites which have only product description and policy page.when i checked their url in open site explorer their DA and PA are only under 15/100 and root domain is only 2 and yet they are ranking to top for the buyer keyword so i want to know is there any chance of outranking them from their position.

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